Vintage (Nov 1977) SEIKO "Bullhead" 6138-0040, all original, serviced

Vintage (Nov 1977) SEIKO

$986.51 Buy It Now or Best Offer
free,30-Day Returns

Seller Store timemachinesuk
(914) 100.0%,

Location: Bristol
Ships to: US,
Item: 266882502268

Return postage will be paid by:Buyer
Returns Accepted:Returns Accepted
After receiving the item, your buyer should cancel the purchase within:14 days
Seiko:Seiko
Department:Men
Type:Wristwatch
Movement:Mechanical (Automatic)
Number of Jewels:21 Jewels
Seiko Bullhead:Seiko Bullhead
Style:Vintage
Year Manufactured:1970-1979
Features:Chronograph

This beautiful Seiko automatic chronograph has just been serviced and is running very well. The chronograph functions as it should with the hands resetting to zero. The case has some marks. The dial is very clean. The crystal is original. The indices and hands have been relumed. The bracelet is not original- it is an after-market reproduction of the bracelet normally found on the Bullhead. It’s size is for a maximum 18cm wrist. Case measures 44mm across, excluding the crown. Lug width 20mm. The gaskets have been changed but assume that the watch is not water resistant. Please check out the other watches I have for sale. What does “fully serviced” mean? The watch movement is removed from the case. The case (and bracelet if there is one) is ultrasonically cleaned. The crystal is polished or replaced depending on condition. The case is not polished as this usually undesirable to collectors and detrimental to the value of the watch. The dial and hands are removed from the movement. These are generally not cleaned because a) it very difficult to clean a watch dial without damaging it, and b) many collectors like the look of vintage patina. So the only treatment they get is dust removal with air blower and Rodico (watchmaker’s blue-tac). The movement is completely stripped down and all the parts are cleaned with solvents in the ultrasonic cleaner. Each part is then inspected for wear or damage, and cleaned by hand if necessary. Parts which are worn or damaged are replaced (either with a N.O.S. part, or if unavailable, then from a donor movement). The mainspring is replaced if it is at all out of shape. The watch is then re-assembled and lubricated. 6 different Moebius lubricants are used depending on the part. The watch is then regulated with a timing-machine software. (All watches have a regulator which speeds up or slows down the watch. The software listens to the watch via a microphone and calculates how many seconds per day it is gaining/losing. The regulator is tweaked until this figure is as close to zero as possible). The dial and hands are re-attached and the movement put back in the case. The watch is then worn for 2 days – 1 week to test it. During this time it is usually regulated again, as a watch’s rate is usually different when worn compared to when static. For a vintage watch being within 30 sec/day is good (most factory specs were about that). If the watch is an automatic then this testing period also ensures that the auto-winding mechanism is functioning correctly.

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